The Hino 268A is a medium-duty cab-over truck commonly used for vocational and delivery applications. Its instrument cluster is designed to provide clear, real-time status of critical systems, with indicators tailored to the vehicle's diesel engine, SCR emissions, and air brake systems.
Hino 268A Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | Illuminates red when a critical fault is detected in the Hino 268A, such as engine shutdown or brake system failure, demanding immediate stop. | Safely pull over, shut down engine, and consult the warning message on the display. | |
| Master Caution | AMBER | Glows amber to alert the Hino 268A driver of non-critical system issues like low DEF or a pending DPF regen that requires attention soon. | Check the information display for details and schedule service as needed. | |
| Check Engine (MIL) | AMBER | Lights up amber on the Hino 268A when the ECM detects an emissions-related or performance fault, often tied to the J08E engine. | Reduce load and have the engine diagnosed with Hino DxII or a compatible scan tool. | |
| Engine Oil Pressure | RED | Activates red if oil pressure in the Hino 268A’s J08E engine drops below safe levels, risking engine damage. | Stop immediately, check oil level and for leaks; do not restart until resolved. | |
| Battery / Charging | RED | Illuminates red when the Hino 268A’s alternator output is low or the battery is discharging, common with a loose belt or failed alternator. | Check alternator belt tension and battery connections; visit a shop for charging system test. | |
| Coolant Temperature | RED | Turns red if engine coolant exceeds safe range in the Hino 268A, often due to low coolant or a stuck thermostat. | Pull over, let engine cool, check coolant level and radiator for obstructions. | |
| Transmission Temp | AMBER | Glows amber when the Allison or manual transmission fluid in the Hino 268A gets too hot, typically under heavy load or extended grades. | Reduce speed, shift to a lower gear, and allow transmission to cool. | |
| Brake System | RED | Lights up red for air brake system faults on the Hino 268A, such as low air pressure or a leak in the brake circuit. | Stop safely, build air pressure, and inspect for leaks; do not drive if pressure stays low. | |
| ABS | AMBER | Illuminates amber when the Hino 268A’s anti-lock braking system detects a fault, leaving standard brakes operational but ABS disabled. | Drive cautiously; have ABS sensors and module checked at a Hino dealer. | |
| Parking Brake | RED | Shows red when the parking brake on the Hino 268A is engaged, reminding the driver to release before moving. | Release parking brake fully before shifting into gear. | |
| Tire Pressure (TPMS) | AMBER | Activates amber when the Hino 268A detects a tire pressure significantly below the recommended level, affecting fuel economy and safety. | Check tire pressures and inflate to specification; inspect for punctures. | |
| Airbag (SRS) | RED | Glows red briefly on startup but stays lit if the Hino 268A’s supplemental restraint system has a fault, risking non-deployment. | Have the airbag system diagnosed by a Hino technician immediately. | |
| Seat Belt | RED | Illuminates red when the driver’s seat belt is not fastened in the Hino 268A, accompanied by an audible chime. | Fasten seat belt before driving. | |
| Glow Plug / Preheat | AMBER | Shows amber during cold starts on the Hino 268A’s diesel engine; stays on longer in cold weather to indicate preheating. | Wait for the light to turn off before cranking the engine. | |
| DPF / Regeneration | AMBER | Lights up amber when the diesel particulate filter on the Hino 268A needs a parked or active regeneration to clear soot. | If parked regen required, find a safe spot and activate via dashboard switch; if active, drive at highway speed. | |
| DEF / AdBlue | AMBER | Glows amber when the Hino 268A’s DEF level is low or the SCR system detects a problem, eventually leading to derate. | Refill DEF tank with approved fluid; if light persists, have the SCR system inspected. | |
| Water in Fuel | AMBER | Illuminates amber when the water separator on the Hino 268A’s fuel filter detects water, which can damage the injection system. | Drain water from the fuel filter bowl immediately; replace filter if necessary. | |
| Low Fuel | AMBER | Turns amber when the Hino 268A’s fuel level is low, typically below 1/8 tank, to avoid running out and air intrusion. | Refuel as soon as possible to prevent fuel system issues. | |
| High Beam | BLUE | Illuminates blue when the Hino 268A’s high beam headlights are active, providing maximum road illumination. | Switch to low beams when approaching oncoming traffic. | |
| Reduced Power (Limp Mode) | AMBER | Lights up amber when the Hino 268A enters derate due to a fault like high exhaust temp or DEF issues, limiting engine power. | Reduce speed and have the fault diagnosed; reset may require dealer intervention. | |
| Air Brake Pressure (Low) | RED | Illuminates red when the Hino 268A’s air brake system pressure drops below 60 psi, making braking unreliable. | Stop immediately and wait for pressure to build; if it doesn't, park and call for service. | |
| Engine / Exhaust Brake | GREEN | Shows green when the Hino 268A’s compression or exhaust brake is activated, aiding downhill speed control. | Use on downgrades to reduce brake wear; disable on slippery surfaces. | |
| Door Open | RED | Glows red when any door on the Hino 268A is ajar, including the cab door or accessory doors. | Close all doors securely before driving. | |
| High Exhaust Temp (HEST) | AMBER | Lights up amber when the Hino 268A’s exhaust system temperature is elevated, often during DPF regeneration, to warn of hot components. | Avoid parking over dry grass; regen will complete automatically. |
24 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Master Warning (Stop) Light
Common causes
- Critical engine fault (e.g., low oil pressure, coolant overheat)
- Brake system failure (air pressure loss)
- Electrical system malfunction (charging failure)
What to do
On a Hino 268A, immediately pull over, shut down the engine, and note the associated warning on the display. Have the vehicle towed to a Hino dealer for diagnosis using the DxII software.
Low Air Brake Pressure
Common causes
- Air compressor failure
- Leak in air lines or brake chambers
- Faulty pressure switch or governor
What to do
On the Hino 268A, stop and let the engine idle to build pressure. If pressure stays below 60 psi, inspect for air leaks with soapy water; replace damaged lines or components. Do not drive until system holds pressure.
Engine Overheat (Coolant Temp)
Common causes
- Low coolant level or leak
- Faulty thermostat or water pump
- Clogged radiator or debris between radiator and charge air cooler
What to do
On the Hino 268A, stop immediately, let engine cool, then check coolant level in the surge tank. If low, add approved 50/50 coolant. Inspect for leaks and ensure radiator fins are clean; if issue persists, replace thermostat.
Check Engine (MIL) with Derate
Common causes
- DEF system fault (SCR catalyst efficiency)
- DPF backlash (excessive soot)
- Sensor failure (NOx, EGT, etc.)
What to do
On a Hino 268A, use a scan tool to retrieve codes. Often, a forced DPF regen or DEF refill clears it. If power is reduced, drive to a dealer for recalibration; avoid ignoring or codes may escalate to a tow.
Transmission Overheat (Transmission Temp)
Common causes
- Overloading or extended heavy pull
- Low transmission fluid level
- Faulty transmission cooler or blocked lines
What to do
On the Hino 268A with an Allison transmission, shift to a lower gear, reduce speed, and let fluid cool. Check fluid level with engine running and transmission warm; top off with approved synthetic fluid. If light persists, inspect cooler for blockages.
Frequently Asked Questions
Why does the Master Caution light stay on in my Hino 268A?
It often indicates a pending DPF regeneration or low DEF level. Check the driver information display for a specific message and follow prompts to initiate a parked regen or refill DEF.
How do I perform a parked regeneration on the Hino 268A?
Park on a level surface away from combustibles, engage parking brake, press the DPF regen switch on the dashboard, and wait 20-30 minutes. The engine will rev and exhaust temps rise; avoid parking indoors.
What does the amber Water in Fuel light mean?
It means the water separator has collected water. On the Hino 268A, locate the drain valve on the fuel filter housing (driver side of engine), place a container, and open until clear fuel flows. Replace filter if water recurs.
Can I drive with the ABS light on in my Hino 268A?
Yes, but ABS is disabled. Standard brakes still work. However, have the system checked soon at a Hino dealer; driving on slippery surfaces without ABS increases stopping distance.
Why does the High Exhaust Temp (HEST) light come on?
It’s normal during DPF regeneration on the Hino 268A. The exhaust system gets hot to burn soot. Light stays just for the regen period (10-30 min). Do not park over dry grass.
What should I do if the Red Brake System light stays on after air pressure builds?
If air pressure is above 90 psi, the light indicates a wiring or switch fault. On the Hino 268A, check the low-pressure switch connector near the air dryer. If the light persists, the brake master cylinder or relay may need service.